Multiple drill.



PATENTED OCT. 16, 1906.

W. W. DOOLITTLE."

MULTIPLE DRILI' APPLICATION FILED NOV. 19. 1903.

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W. W. DOOLITTLE.

MULTIPLE DRILL. APPLICATION TILBDNOV.19,41903.

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a s e I 6 w No. 833,590. PATENTED OCT. 16, 1906. W. W. DOOLITTLE.

MULTIPLE DRILL.

APPLICATION IILnn x0v.1a.19os.

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I PATENTED OCT. 16, 1906.

w. w. DOOLITTLE. MULTIPLE DRILL.

APPLICATION FILED ROY. 19.1903.

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IN a PATENTED OCT. 16, 1906.

W. W. DOOLITTLE.

MULTIPLE DRILL.

APPLIOATION FILED NOV.19,1903.

6 SHEETS-SHEET 5 zifl UNITED STATES PATENT OFFICE;

WILLIAM W. DooLrrrLE, or CHICAGO, ILLINOIS, ASSIGNOR TO CRANE COMPANY,or CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MULTIPLE DIRILL.

Specification of Letters Patent,

Patented Oct 1 6, 1906.

Application filed November 19,1908. Serial Ho. 181.764.

LITTLE, a citizen of the United States, residing at Chicago, in theState of Illinois, have invented certain new and useful Im rovements inMultiple Drills, of which the ollowinglis a specification;

y invention relates particularly to machinery for drilling a series ofholes simultaneously, and to improvements in means for. rotating thedrills and in arrangements for readily shifting them, to adjust theposition of the-holes, et cetera. The objects of the invention are, toprovide a drill element which embraces in one compact movable part .amotor and means for the drill om the motor, said drill element beingshiftable to arrange the position of the drill; to provide aconveniently arranged series of said drill elements for accurate andeflicientf operation; to rovide a superior means for drivmg the d 1 l byan electric motor; to provide improved means for advancin the work.

against a series of drills; to pro'vi e superior electrically o eratedmechanism for mani u:

lating both't e'work and the drills, an to opera-.

generally im rove the structure and tion of machines for multipledrilling.

The above objects, together with other advantages which will hereinafterap ear, Iattain b means of the mechanism Blustrated in pre erred form inthe accompanying drawwhereinigure l is a front elevation and partialsection of the entire machine;

Figure 2 is aside elevation of the machine taken at right angles to theview of Figure 1, and showing in section the mechanism 'for raising andoweringthe table; 3

I Fi e 3 is a plan view of the machine, the drill chucks be] shown byarranged in circ ar position;

gure 4 is an nlarged'side elevation of the drill element; 4

" re 5 is a horizontal cross section of the drill olders, on'line(5) ofFigures 1 and4;

Figure 6 is a plan viewof the base of the machine and the shiftabletable for carrying the work and a more detailed" view of the mechanismfor rais' and lowering the table; l-lh'gure 7 is a mo cation of theabutment p ate. 1

. r In the machine as arranged for illustra ion dotted lines as a pairof upright posts 9 which at their to carry a circular fiat table ring 10upon whic are seated the drill elements to be hereinafter described. Twoposts 11 rise from c onven-' ient points on the top of the table 10 andon their upper ends they 09,1133 an abutment plate 12, which is thusligi y fixed to the table ring 10.

On the to of the table 10 I arrange any desired num er of drillelements, so as to be movable thereon, These elements, as shown inFigure 4, consist of the base 13 carrying an electric motor 14 which isseated upon the rearlefnd of 13116 base 13 mi this latter has a ri orwarrojecting ame portion 15. Tile spindle 03 th which by means of the gear17 drives the shaft 18 which extends downward and- 'through the lowerportion of the frame 15,. and bv means of a universal joint 19 is'attache to the revolvable diill chuck 20 carried in the head 21 anddriving'the'drill 22 projecting vertically therefrom. The. motor 14-maybe driven bymeans of currentintroduced b wires from overhead. Otherwise,as will motor may be used in place of the electric .motor 14,--this notbeinga necessary part of my invention, as respects the generalorganization of the machine.

It will be seen that there is a large opening at the center of the table10 and that each one of the drill elements projects downwardtherethrough to hold the drill 22 at'proper posi-, tion to operate uponthe work and that the stationary in'vertical height, and 'for moving emotor carries the gear 16 and shown in the accompanying drawings, itwill be observed that on the'base 8 I provide.

e understood, a different kind of the work I provide the verticallymovable rotary table 23 which rests upon a base 24 borne upon tworeciprocatlnglposts 25 which move vertically to advance e work againstthe drills. 7 ..Projecting downward from the base 8 of the machine,which is preferably made flush which the hollow posts reci rocate.Within the posts 25 and working t rough nuts 28 which support osts 25are vertical screws 27 which at the ottom are journaled in the bracket29 resting on the bearings 30 (Figure 2). mesh with the gear 32,- on theshaft .33. There are preferably two of these screws 27,

and between the two, near the center of the table is provided a guideand pivoting sleeve and rod 34. The weight of the table iscounterbalanced by weight suspended from ulley 36, by a chain attachedto post25.

he shaft 33 with its gear 33 is driven by a gear on the shaft 37 andthis in turn. by the gears 38 and 39 through the shaft 40 and the gear41.

In cases where it is desired to operate the screws 27 rapidly forinitiallyladjusting the table, this gear 41 is driven by the gear 41 andthe shaft 42', which is driven directly by pulley 43 and the belts 44,44 in either direction desired, from the pulleys 45 on the shaft of themotor 46 suspended from the table 10, as will be apparent from Figure 1.The belts 44 for throwing gear 41 into opera,- tion to turn shaft 40rapidly, are operated by sleeve 52- through the lever 53. i

For slower motion of the screws 27 and the advancing of the table 23against the work,

the shaft 46 is preferably driven by means of.

. the worm 50 which engages gear 51 on the .54 having handle 55. Thereare provisions,

as will be understood, for changing the direction of motion of thescrews 27 and for several variable speeds thereof.

' group the drills upon t '5 5 In order to allow of a greater range ofmovement of the drill elements on to of the table 10 and of the motorsbeing ought closer to each other, I make every alternate one of theframes 15 of less height than the neighboring ones on the two sides, andarrange the positions of gears 17 correspond- .50

ingly, as will be seen in Figure 1. By this arran ment the motors may bebrought very c ose to each otherand a larger range of radial movement isrovided in order to he work as may be de-. sired, which also permits theuse of a larger gear than could otherwise be utilized. It will beunderstood that the table 23 is piv oted on its support24, and swingsabout the post 34 as a center, to adjust thework. The wiresfromthevarious motors may be 1 ouped together'and all operated by a. singldrheostat. In Figure 7 I have indicated a modifica-- tion in whichtheabutment plate 12 is pro-- vided with a coil- 12" and ismagnetized soas The screws are driven by gears 31 which utch for throwto attract theheads of the posts 15 of the several drill elements and thus anchor themin'place during the drilling. They may be released by demagnetizationwhen it is desired to movethem. The many advantages of these deviceswill readily occur to those familiar with the art.

Having thus described my invention and illustrated its use, What I claimas new, and desire to secure by Letters Patent, is the followin 1. 3multiple drill comprising a work table .and means for moving it, a backthrust abutment, a support, and a series of independently movableunattached drill elements movable thereon between the abutment and thetable, each of said elements comprising a se arate motor and drill withcaring between t em.

'2. A multiple drill comprising amovable table and means for movin it,and a series of drill elements independent y movable in severaldirections over the table and arranged to operate thereon, each of saiddrill elements carrying within itself a motor and complete drill ear.

3. n a multiple drilling machine the combination of a resistanceabutment, a support, and an independently movable unattached drillelement comprising a motor mounted in a frame, a series of gears drivenby the motor and carried entirely within said frame, and a drill chuckalso carried in the frame, the whole'of the connected devices beingunattached from the machine and bodily movable on the support under saidresistance abutment.

4. In a multiple drilling machine, an inde pendently movable drillelement comprising a motor mounted in a frame, a series of cars drivenby the motor and carried entire y in said frame, and a drill chuck alsocarried in said frame, the whole of the connected devices beingunattached and bodily movable, the machine having also i a support forthe drill elements and means for receiving the back thrust u n thedrill.

5. In a mu tiple drill the combination with a carrying table and anabutment ate, of an unattached independently move 0 drill ele-- mentcomprisin a motor and a frame carrying a rotary dril gearing to connectthe motor and the drill, all mounted in one ri id frame, and the thrustof the work against t e drill being taken up by said abutment plate, andmeans by which the work '5 advanced against the drill.

6. The combination with a set of unattached and independently movabledrill elements each containing driving means, of a common abutment forta up thrusts upon the several drills, and a movable table and means formoving it against the drills 7. The combination with a reciprocatingwork table, of an unattached and mdependtently movable frame carrying amotor, a

drill and connecting mechanism, and an abutment plate to take updirectly the upward thrust on the drill. l

8. In a multiple drill, a series of drill elements comprising each aseparate electric motor, a drill and connecting gearin the said drillelements being movable at w' l and having magnetic means for holdingthem in place in the machine.

9. In a multiple drill having a series of independently movableself-contained drilling and a direct gear, including a shaft with auniversal joint, between the motor and the drill chuck, all the partsbeing carried on and movable with the single frame combined with asupporting table anda back thrust abuta drill spindle and a body portioncarr ment,v Between which parts the drill frame may be moved freely inany direction.

11. An independently movable drill element comprising a ri 'd frame, anelectric motor fixed horizontali thereon, 'a verticall arranged drillchuck on the frame, a sha geared to, the motor shaft and outwardlyinclined therefrom, and a universal nectin the shaft and the drill chuc12. n a drilling machine, a supporting table, a drill elementindependent of the table and movable bodily thereon and comprising adrive shaft connected to the drill spind e, a nd means above the drillelement adapted to take the back thrust therefrom.

In testimony whereof I have hereunder signed my name in the presence ofthe two subscribed witnesses.

WILLIAM W. DOOLITTLE.

v Witnesses:

PAUL CARPENTER, EDWARD O. BURNS.

Loint coni,

